There is an easy and quick procedure necessary , to be done, to clear Cisco Webex Cache.
It is really easy, but, in any case, I take note, about it, on blog.
Be aware that, on Citrix Environment, you should add, this path, to Exclusions list - folders that you should not syncronize (using Roaming profiles) (avoiding, in this case, to waste time during login and wasting disk space as well)